#include<stdlib.h>
#include<stdio.h>

int main(int argc,char argv[]){

    // char strs[] = {"hello","world"};
    char strs[] = {'a','b','c','d'};
    char *pstr = strs;
    // printf(" %c \n",*(pstr + 2));
     int *pin = calloc(3,sizeof(int));
     *pin = 10;
     *(pin+1) = 20;
     *(pin +2) = 30;
    //  realloc(pin,sizeof(int));
    printf(" %d \n",*(pin + 1));
    
//    char a = 'A';
//    char *p = &a;
//    char **pp = &p;
//    printf(" %c \n",**pp);



   return 0;
}